JP2005145327A - Vehicular air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the energy-saving effect by selecting an air-conditioning control method advantageous to energy-saving, by discriminating an air-conditioning state in a cabin, when an occupant detecting means 27 detects that an occupant is not seated on a seat except for a driver's seat, or when selective input is performed by an air-conditioning air blowout control selecting means 33. <P>SOLUTION: This vehicular air conditioner has an air-conditioning state determining means 34 for determining which of a plurality of predivided patterns is a present air-conditioning state. The air conditioner is characterized by switching a control method of an air blowing state from an air-conditioning air blowout port opposed to an occupant absent seat in response to a determining result of the air-conditioning state determining means 34, when the occupant detecting means 27 detects that the occupant is not seated on the seat except for the driver's seat. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vehicle air conditioner.

  In the vehicle air conditioner disclosed in Japanese Patent Application Laid-Open No. 2002-248936, the presence or absence of an occupant in each seat is detected by an occupant detection means such as a seat sensor, and when no occupant is seated in a seat other than the driver's seat, Energy saving is achieved by performing control (hereinafter referred to as air-conditioning control for single passengers) to stop blowing air-conditioned air from the air outlet facing the seat. In addition, in this vehicle air conditioner, the comfort of the driver can be reduced by reducing the amount of air blown from the air outlet facing the driver's seat or controlling the compressor so that the air temperature rises when the passenger is alone. Energy conservation is achieved by appropriately controlling the cooling and heating performance while ensuring a feeling.

  In addition, the present inventors, instead of the occupant detection means, provide means for selecting whether or not the user shifts to air-conditioning control during single boarding (hereinafter referred to as air-conditioning wind blowing control selection means), We have already proposed a vehicle air conditioner that saves energy.

  In each of the prior arts described above, when the occupant detection means determines that only the driver is seated, or when the user selects with the air-conditioning wind blowing control selection means, the system shifts to air-conditioning control for single passengers. However, according to the experiments of the present inventor, such control provides an energy saving effect in the air conditioning stability period, but conversely, the energy consumption increases in the air conditioning transition period such as the initial stage of cooling. The result that is not obtained.

This is because air conditioning control during single passengers during the air conditioning transition period decreases the cooling capacity, slows down the temperature drop in the passenger compartment, and the room temperature does not decrease easily. This is because it becomes longer than normal air conditioning control.
JP 2002-248936 A

  The problem to be solved is that, in the transition period of air conditioning, if control is performed to stop the blowing of conditioned air from the air outlet facing the seats other than the driver's seat, the energy consumption increases.

  In order to achieve the above object, the first invention has occupant detection means 27 for detecting whether or not an occupant is seated in each seat, and the occupant detection means 27 includes at least one driver seat. An air conditioner for a vehicle that controls an air blowing state from an air-conditioning air outlet facing an absent seat when it is detected that no occupant is seated on the seat, and the current air-conditioning state is classified in advance. The air-conditioning state determination unit 34 for determining which of the plurality of patterns is provided, and the air-conditioning state determination unit 34 when the occupant detection unit 27 detects that no occupant is seated in a seat other than the driver's seat. According to the determination result, the control method of the air blowing state from the air-conditioning air outlet facing the seat where the occupant is absent is switched.

  In addition, the second invention has an air-conditioning air blowing control selection means 33 for selecting and inputting a control method of a blowing state from an air-conditioning air blowing outlet facing at least one seat excluding the driver's seat. A vehicle air conditioner configured to control the air blowing state from the air conditioning air outlet facing at least one seat excluding the driver's seat by the control method selected and inputted when the selection input is made by the control selection means 33. The air-conditioning state determination means 34 for determining whether the current air-conditioning state is one of a plurality of previously classified patterns, and when the selection input is made by the air-conditioning air blowing control selection means 33, the air-conditioning state determination means 34 According to the determination result of the state determination means 34, the control method of the ventilation state from the air-conditioning wind blower outlet facing at least one seat except a driver's seat is switched.

  The vehicle air conditioner of the present invention can be used when the occupant detection means 27 detects that no occupant is seated in a seat other than the driver's seat, or when the selection input is made by the air-conditioning air blowing control selection means 33. By determining the air conditioning state in the room and selecting an air conditioning control method that is advantageous for energy saving, the energy saving effect is improved.

  Hereinafter, an embodiment of the present invention will be described. Drawing 1 is a schematic structure figure of the important section of the air-conditioner for vehicles of an embodiment. In the figure, reference numeral 1 denotes an air conditioner main body, which is installed in the instrument panel so as to be positioned at a substantially central portion in the vehicle width direction. A blower 2 and an evaporator 12 are provided inside the air conditioner body 1, and a face duct 3 is connected to the case of the air conditioner body 1. The face duct 3 has four air passages 3a to 3d.

  A driver-seat-side central face outlet 4 is provided in front of the driver's seat in the vehicle interior and substantially in the center of the vehicle width direction, and a passenger-seat-side central face outlet 5 is provided in front of the passenger seat and substantially in the center of the vehicle width direction. ing. A passage 3a is connected to the driver seat side central face outlet 4, and a passage 3b is connected to the passenger seat side central face outlet 5.

  Further, a driver seat side face outlet 6 is provided on the window side of the driver seat side in the passenger compartment, and a passenger seat side face outlet 7 is provided on the window side of the passenger seat. A passage 3 c is connected to the driver seat side face outlet 6 and a passage 3 d is connected to the passenger seat side face outlet 7.

  The conditioned air sucked by the blower 2 passes through the evaporator 12, and then is supplied to the face outlets 4 to 7 through the air passages 3a to 3d, and is blown out from each outlet toward the upper body of the occupant.

  A damper 8 as a passage opening / closing means is provided in the air passage 3b communicated with the passenger seat side central face outlet 5 and a damper as a passage opening / closing means is provided in the air passage 3d communicated with the passenger seat side face outlet 7. 9 is provided. Specific examples of the damper include a cantilever door, a butterfly door, and a film damper. The damper adjusts the amount of blown air by rotating, and since it is easy to control, the control means can be configured easily.

  The dampers 8 and 9 are rotatably supported by the air passages 3b and 3d through a single shaft 10 which is an interlocking means. Driving means 11 is connected to the end of the shaft 10 protruding to one side of the air passage 3d. The shaft 10 and the driving means 11 constitute a passenger seat side face outlet opening / closing means 13.

  If the linear shaft as in the present embodiment is used as the interlocking means 10, there is an advantage that it can be configured at low cost. In addition to a straight shaft, a crank shaft, a link mechanism, or the like can be used. The crank-shaped shaft and the link mechanism are effective when applied when the rotational axes of the dampers 8 and 9 are offset.

  As the drive means 11, for example, an electric drive source such as a motor, a manual lever, or the like can be used. In the former case, the dampers 8 and 9 can be automatically driven by being controlled by the air conditioning control computer, so that it is possible to cope with the automatic air conditioning control, and it is necessary to manually rotate the dampers 8 and 9. There is an advantage that operability is improved because there is no device. On the other hand, in the latter case, there is an advantage that a control system is unnecessary, the structure is simplified, and the structure can be made at low cost.

  Since the dampers 8 and 9 are interlocked with each other via the shaft 10, the dampers 8 and 9 can be driven by one driving means 11, and the product cost can be reduced.

  FIG. 2 is a schematic configuration diagram of the control system of the first embodiment. The air conditioning control computer 21 of the present embodiment includes a temperature setter 22 for a passenger to input a set temperature, a vehicle interior temperature sensor 23, an outside air temperature sensor 24, a solar radiation sensor 25 for detecting the amount of solar radiation, and the air after the evaporator 2. Suction temperature sensor 26 for detecting temperature, occupant detection means 27 for detecting whether or not an occupant is seated in each seat, and air conditioning for determining whether the current air-conditioning state is a plurality of previously divided patterns. A state determination unit 34 is connected.

  The occupant detection means 27 is comprised by a seat sensor, an infrared sensor, etc., for example.

  Moreover, the air-conditioning state determination means 34 is comprised by the program stored, for example in ROM of the microcomputer.

  In the present embodiment, the air conditioning state is classified into state A and state B, and the air conditioning state determination unit 34 determines which of these is the state, and the air conditioning control is performed based on the determination.

  Further, the air conditioning control computer 21 includes a blower control means 28 for controlling the blower 2 and an air mix door for adjusting the mixing ratio of the conditioned air cooled by the evaporator 3 and the conditioned air heated by the heater core (not shown). The air mix control means 29 for controlling (not shown), the air outlet control means 30 for controlling the opening degree of the door (not shown) for adjusting the amount of air blown from each air outlet, and the dampers 8 and 9 are controlled. A passage opening / closing means 31 and other control means 32 are connected.

  The air conditioning control computer 21 calculates the control amounts of the control means 28 to 32 based on information from the temperature setting device 22, the sensors 23 to 26, the occupant detection means 27, and the air conditioning state determination means 34, and outputs it to each control means. To do.

  FIG. 3 is a flowchart showing the operation procedure of the first embodiment.

  When the control flow starts, first, the detection values of the sensors 22 to 26 are acquired (step S10). Next, the detection result of the occupant detection means 27 is acquired (step S20), and it is determined whether all seats except the driver's seat are not seated (step S30). In the case of YES, data relating to the current air conditioning state is acquired (step S40), and based on this, it is determined whether the air conditioning state is A or B (step S50). The air conditioning state A is a case where energy consumption becomes large when air conditioning control is carried out when the passenger is alone, and the air conditioning state B is a case where an energy saving effect is obtained by performing air conditioning control when the passenger is alone. When the air-conditioning state is B, the control amount for the single passenger is calculated (step S60) and output to the air-conditioning control computer 21 (step S70).

  That is, when the blower air flow rate and air temperature are set to values corresponding to single passengers, and when the air-conditioning air blowing is in the face mode, the passage opening / closing means 31 rotates the dampers 8 and 9 in the closing direction. The amount of air blown from the outlets 5 and 7 is limited. At this time, the air flow rate is reduced or set to 0 compared with the normal time. Thereby, since the work amount of the blower 2 and the compressor can be reduced, energy saving can be achieved.

  If NO in step S30, a normal control amount is calculated and output to the air conditioning control computer 21 (step S80). That is, when the blower air flow rate and the air temperature are set to normal values, and the blowout of the conditioned air is in the face mode, the passage opening / closing means 31 rotates the dampers 8 and 9 in the opening direction to open the air passage. Open 3a and 3b completely.

  If NO in step S50, that is, if the air conditioning state is A, the process proceeds to step S80 and normal air conditioning control is performed. Thus, even when the occupant is only the driver, energy saving can be achieved as compared with the prior art by selecting an air conditioning control method that is advantageous for the energy saving effect according to the air conditioning state.

  FIG. 4 is a schematic configuration diagram of the control system of the second embodiment, and FIG. 5 is a flowchart showing an operation procedure of the second embodiment. In addition, the same code | symbol is attached | subjected to the part same as 1st Embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 4, the air-conditioning control computer 21 of this embodiment is connected to air-conditioning wind blowing control selection means 33 instead of the passenger detection means 27 of the first embodiment, and the passenger operates it. By this, the control system which restrict | limits the ventilation state from the air-conditioning wind blower outlet facing the seats other than a driver's seat can be selected now.

  The air-conditioning wind blowing control selection means 33 is for selecting / releasing (returning to normal control) the control method for single passengers according to the will of the occupant. It is conceivable that a switch to be released is newly installed on the air conditioner control panel, the handle portion, or the like, or another switch (air conditioner operation switch) arranged on the air conditioner control panel has the function. If the air conditioner is set through the monitor screen, a switch may be provided in the setting screen.

  The air conditioning control computer 21 calculates control amounts of the control means 28 to 32 based on information from the temperature setting device 22, the sensors 23 to 26, the air conditioning air blowing control selection means 33, and the air conditioning state determination means 34. Output to the means.

  When the control flow starts, first, the detection values of the sensors 22 to 26 are acquired (step S110). Next, selection information of the air-conditioning wind blowing control selection means is acquired (step S120), and it is determined whether or not the single passenger control method is selected (step S130). In the case of YES, the air conditioning state determined by the air conditioning state determination means 34 is acquired (step S140), and it is determined whether or not the state is A (step S150). In the case of NO, the control amount at the time of boarding alone is calculated (step S160) and output to the air conditioning control computer 21 (step S170).

  That is, when the blower air flow rate and air temperature are set to values corresponding to single passengers, and when the air-conditioning air blowing is in the face mode, the passage opening / closing means 31 rotates the dampers 8 and 9 in the closing direction. The amount of air blown from the outlets 5 and 7 is limited. At this time, the air flow rate is reduced or set to 0 compared with the normal time. Thereby, since the work amount of the blower 2 and the compressor can be reduced, energy saving can be achieved.

  If NO in step S130, a normal control amount is calculated and output to the air conditioning control computer 21 (step S180). That is, when the blower air flow rate and the air temperature are set to normal values, and the blowout of the conditioned air is in the face mode, the passage opening / closing means 31 rotates the dampers 8 and 9 in the opening direction to open the air passage. Open 3a and 3b completely.

  If YES in step S150, that is, if the air conditioning state is A, the process proceeds to step S180 to perform normal air conditioning control. In this way, even when the air-conditioning control method for single passengers is selected, the air-conditioning control method that is advantageous for the energy-saving effect is selected according to the air-conditioning state, so that energy saving can be achieved compared to the conventional case. Can do.

  FIG. 6 is a flowchart showing the operation procedure of the first embodiment. In this embodiment, the air conditioning state A is the air conditioning transition period and the air conditioning state B is the air conditioning stability period in the first embodiment. The air conditioning transition period means a state in which the temperature environment in the passenger compartment changes every moment as in the early stage of cooling, and the air conditioning stability period means a state in which the temperature environment in the passenger compartment is constant. ing.

  Thus, even when the air-conditioning control method for single passengers is selected based on the detection result of the occupant detection means 27, the air-conditioning control method advantageous for energy saving effect according to the air-conditioning state (normal control during the air-conditioning transition period, air-conditioning stability) By selecting “air-conditioning control for single passengers” during the period, it is possible to save energy compared to the prior art.

FIG. 7 is a flowchart showing the operation procedure of the second embodiment. In this embodiment, in the first embodiment, a case where the air conditioning state, was to determine the difference between the thermal load state value Q and the thermal load predetermined value Q _S of the vehicle interior.

Here, the heat load state value Q in the vehicle interior is a value based on various factors (for example, the outside air temperature, the vehicle interior temperature, the amount of solar radiation, etc.) related to the temperature environment in the vehicle interior. Further, the thermal load predetermined value Q _S, as the reference value for determination is a value previously determined by experiments or the like.

  In step S40, a predetermined heat load value Qs stored in advance in the air conditioning control computer 21 is read. In step S50, the difference between Q and Qs is calculated, and when the absolute value of the difference is less than a predetermined determination value a. Determines that the air-conditioning stability period and proceeds to step S60 to perform air-conditioning control when one person rides. On the other hand, if the absolute value of the difference between Q and Qs is greater than or equal to the predetermined determination value a, it is determined that the air-conditioning transition period is reached, and the routine proceeds to step S80 where normal air-conditioning control is performed. Note that the determination value a is a value determined from the viewpoint of the maximum energy effect and the like, and is obtained by experiments or the like.

  FIG. 8 is a schematic configuration diagram of the control system of the third embodiment, and FIG. 9 is a flowchart showing an operation procedure of the third embodiment.

In the present embodiment, air conditioning control is performed with the heat load state value of the second embodiment as the passenger compartment temperature. That is, the vehicle interior temperature predetermined value Ts stored in the air conditioning control computer 21 is read in step S40, and the difference between the vehicle interior temperatures Tinc and Ts detected by the vehicle interior temperature sensor 23 is calculated in step S50. If the absolute value is less than the preset determination value b, it is determined that the air-conditioning is stable, and the process proceeds to step S60 to perform air-conditioning control when one person rides. Further, if the absolute value is equal to or greater than the determination value b set in advance of the difference between Tinc and T _S, the process proceeds to step S80 it is determined that the air-conditioning transitional performs normal air-conditioning control.

  FIG. 10 is a schematic configuration diagram of the control system of the fourth embodiment, and FIG. 11 is a flowchart showing an operation procedure of the fourth embodiment.

  As shown in FIG. 10, in this embodiment, a vehicle interior temperature detection sensor 35 for detecting the temperature of the content in the vehicle interior is provided, and the detected temperature and a predetermined value stored in the air conditioning control computer 21 are provided. The air conditioning control is performed by comparing the above. Specifically, a surface temperature of a vehicle interior content part (for example, a resin member such as a console box, a window glass, etc.) having a correlation with the vehicle interior temperature is detected by a non-contact type temperature sensor such as an infrared sensor. It is conceivable to perform air conditioning control based on this.

  As shown in FIG. 11, first, a predetermined value Tms of the vehicle interior temperature stored in the air conditioning control computer 21 is read in step S35, and the vehicle interior content detected by the vehicle interior temperature sensor 35 is detected in step S50. The difference between the object temperatures Tm and Tms is calculated, and if the absolute value of the difference is less than the preset determination value c, it is determined that the air-conditioning is stable and the process proceeds to step S60 to perform air-conditioning control when one person is on board. . On the other hand, if the absolute value of the difference between Tm and Tms is greater than or equal to the preset determination value b, it is determined that the air conditioning transition period, and the routine proceeds to step S80 where normal air conditioning control is performed.

  FIG. 12 is a flowchart showing the operation procedure of the fifth embodiment.

  In this embodiment, the air conditioning state is determined based on the difference between the thermal load state value Q in the passenger compartment and the target thermal environment state value Qt. Here, the target thermal environment state value Qt is a heat load state in the passenger compartment set by the passenger, and the air conditioner performs air conditioning control to achieve the target state.

  First, in step S40, the thermal load state value Q and the target thermal environment state value Qt are read. In step S50, the difference between the thermal load state value Q and the target thermal environment state value Qt is calculated, and the absolute value of the difference is set in advance. If it is less than the determined value d, it is determined that the air conditioning is stable, and the process proceeds to step S60 to perform air conditioning control when one person is on board. On the other hand, if the absolute value of the difference between Q and Qt is greater than or equal to the predetermined determination value d, it is determined that the air conditioning transition period, the process proceeds to step S80, and normal air conditioning control is performed.

  That is, in the present embodiment, by determining the air conditioning state based on the target thermal environment state value Qt set by the occupant, it is more realistic than the case where the air conditioning control is performed based on the preset thermal load predetermined value. It is possible to perform appropriate air conditioning control.

  The determination value d is a value determined from the viewpoint of the maximum energy saving effect, etc., and is obtained by experiments or the like. Further, in order to suppress hunting of the vehicle interior environment state due to control switching, the value may be appropriately changed according to the air conditioning control state at that time.

  FIG. 13 is a schematic configuration diagram of the control system of the sixth embodiment, and FIG. 14 is a flowchart showing an operation procedure of the sixth embodiment.

  In the present embodiment, the air-conditioning state is determined using the passenger compartment temperature detected by the passenger compartment temperature sensor 23 and the target thermal environment state value as the set temperature set by the passenger.

  In step S40, the detected temperature Tinc of the vehicle interior temperature sensor 23 and the set temperature Tptc of the temperature setting device 22 are read. In step S50, the difference between the set temperature Tptc and the detected temperature Tinc of the vehicle interior temperature sensor 23 is calculated. If the value is less than the preset determination value e, it is determined that the air-conditioning is stable, and the process proceeds to step S60 to perform air-conditioning control when one person is on board. On the other hand, if the absolute value of the difference between Tptc and Tinc is greater than or equal to the preset determination value e, it is determined that the air-conditioning transition period is reached, and the routine proceeds to step S80 where normal air-conditioning control is performed.

  In the present embodiment, since output information of existing devices (temperature setting device, vehicle interior temperature sensor) is used for air conditioning state determination, there is an advantage that it is not necessary to add new devices and can be configured at low cost.

  FIG. 15 is a flowchart showing the operation procedure of the seventh embodiment.

  In this embodiment, the determination of the air conditioning state is based on the heat load state value of the vehicle interior environment, and when the rate of change ΔQ / Δt of the heat load state value per unit time Δt is equal to or greater than the determination value f, it is determined that the air conditioning transition period. Therefore, normal air-conditioning control is performed, and if it is less than that, it is determined that the air-conditioning is stable and air-conditioning control is performed when one person is on board.

  ΔQ is obtained as follows. That is, when the vehicle interior thermal load state value before unit time Δt is Q ′ and the current vehicle interior thermal load state value is Q, the absolute value of the difference between Q ′ and Q is ΔQ.

  First, in step S40, the current vehicle interior thermal load Q is read. Then, ΔQ is calculated in step S50, and if ΔQ / Δt is less than the determination value f, it is determined that the air-conditioning is stable and the process proceeds to step S60 to perform air-conditioning control when one person is on board. On the other hand, if ΔQ / Δt is equal to or greater than the determination value f, it is determined that the air-conditioning transition period, the process proceeds to step S80, and normal air-conditioning control is performed.

  In this embodiment, there is an advantage that the air conditioning state can be determined only by the information on the vehicle interior thermal load state value without requiring the target value of the heat load state value.

  FIG. 16 is a flowchart showing the operation procedure of the eighth embodiment. The schematic configuration of the control system of this embodiment is the same as that shown in FIG.

  In this embodiment, the vehicle interior thermal load state value is the vehicle interior temperature detected by the vehicle interior temperature sensor 23, and when the rate of change ΔTinc / Δt in the vehicle interior temperature per unit time Δt is equal to or greater than the determination value g, the air conditioning transition period Therefore, the normal air-conditioning control is performed, and if it is less than that, it is determined that the air-conditioning is stable and the single-passenger air-conditioning control is performed.

  ΔTinc is obtained as follows. That is, assuming that the vehicle interior temperature before unit time Δt is Tinc 'and the current vehicle interior temperature is Tinc', the absolute value of the difference between Tinc 'and Tinc is ΔTinc.

  In step S50, ΔTinc is calculated. If ΔTinc / Δt is less than the determination value g, it is determined that the air-conditioning is stable, and the process proceeds to step S60 to perform air-conditioning control when one person rides. On the other hand, if ΔTinc / Δt is equal to or greater than the determination value f, it is determined that the air conditioning transition period, and the process proceeds to step S80, where normal air conditioning control is performed.

  FIG. 17 is a flowchart showing the operation procedure of the ninth embodiment. The schematic configuration of the control system of this embodiment is the same as that shown in FIG.

  In this embodiment, the vehicle interior heat load state value is set as the temperature of the vehicle interior content detected by the vehicle interior content temperature sensor 35, and the rate of change ΔTm / Δt of the temperature of the vehicle interior content per unit time Δt is a determination value. When it is greater than or equal to h, it is determined that the air conditioning transition period, and normal air conditioning control is performed. When it is less than that, the air conditioning stability period is determined and single passenger air conditioning control is performed.

  ΔTm is obtained as follows. That is, assuming that the vehicle interior temperature before unit time Δt is Tm ′ and the current vehicle interior temperature is Tm, the absolute value of the difference between Tm ′ and Tm is ΔTm.

  First, Tm is acquired in step S40, ΔTm is calculated in step S50, and if ΔTm / Δt is less than the determination value h, it is determined that the air conditioning is stable, and the process proceeds to step S60, where the air conditioning control for single passengers is performed. Do. On the other hand, if ΔTm / Δt is equal to or greater than the determination value h, it is determined that the air-conditioning transition period, the process proceeds to step S80, and normal air-conditioning control is performed.

  According to the present embodiment, when an infrared sensor is used for the occupant detection means 27, there is an advantage that the sensor can also be used as a vehicle interior content temperature detection sensor.

  FIG. 18 is a flowchart showing the operation procedure of the tenth embodiment.

  In this embodiment, the determination of the air conditioning state is based on the control amount Vc calculated and output by the air conditioning control computer 21. When the change rate ΔVc / Δt of the control amount per unit time Δt is equal to or greater than the determination value i, the air conditioning is performed. It is assumed that the transition period is normal air-conditioning control, and if it is less than that, it is determined that the air-conditioning stable period and air-conditioning control for single passengers is performed.

  ΔVc is obtained as follows. That is, when the control amount calculation value before the unit time Δt is Vc ′ and the current control amount calculation value is Vc, the absolute value of the difference between Vc ′ and Vc is ΔVc. Specific examples of the control amount include the blower voltage, the temperature control and the opening degree control amount in the air conditioning unit for air outlet selection, the target temperature of the conditioned air calculated by the air conditioning control computer 21 based on various sensor information, and the like.

  In step S50, ΔVc is calculated, and if ΔVc / Δt is less than the determination value i, it is determined that the air-conditioning is stable, and the process proceeds to step S60 to perform air-conditioning control when one person is on board. On the other hand, if ΔVc / Δt is greater than or equal to the determination value i, it is determined that the air-conditioning transition period, the process proceeds to step S80, and normal air-conditioning control is performed.

  In addition, according to the present Example, there exists an advantage that the determination accuracy of an air-conditioning state improves by using the control value which the air-conditioning control computer 21 calculates and outputs for a direct determination.

  FIG. 19 is a schematic configuration diagram of the control system of the eleventh embodiment, and FIG. 20 is a flowchart showing an operation procedure of the eleventh embodiment.

  In the present embodiment, a body surface temperature detection sensor 36 for detecting the body surface temperature of the passenger is provided, and the detected temperature is compared with a predetermined value stored in the air conditioning control computer 21 to perform air conditioning control. Yes. Specifically, it is conceivable to detect the occupant's body surface temperature with a non-contact temperature sensor such as an infrared sensor, and to determine the air conditioning state based on this.

  As shown in FIG. 20, first, the body surface temperature predetermined value Tman stored in the air conditioning control computer 21 is read in step S35, and the body surface temperature Tman is acquired in step S40. In step S50, the difference between the occupant body surface temperatures Tman and Tman detected by the body surface temperature detection sensor 36 is calculated, and if the absolute value of the difference is less than a preset determination value i, Judgment is made and the process proceeds to step S60, where air-conditioning control is carried out when one person rides. On the other hand, if the absolute value of the difference between Tman and Tman is greater than or equal to the preset determination value i, it is determined that the air-conditioning transition period, and the routine proceeds to step S80 where normal air-conditioning control is performed.

  In the present embodiment, since the determination of the air conditioning state is based on the body surface temperature of the occupant, there is an advantage that the feeling of the air conditioning state held by the occupant can be reflected in the air conditioning control.

  FIG. 21 is a flowchart showing the operation procedure of the twelfth embodiment.

  In this embodiment, when the rate of change ΔTman / Δt of the body surface temperature per unit time Δt is equal to or greater than the determination value k, it is determined that the air conditioning transition period is normal, and normal air conditioning control is performed. Judgment is made and air-conditioning control is performed when one person rides.

  ΔTman is obtained as follows. That is, when the body surface temperature before unit time Δt is Tman ′ and the current body surface temperature is Tman, the absolute value of the difference between Tman ′ and Tman is ΔTman.

  In step S40, the body surface temperature Tman is acquired, and when ΔTman / Δt is less than the determination value k, it is determined that the air conditioning is stable, and the process proceeds to step S60 to perform air conditioning control when one person is on board. On the other hand, if ΔTman / Δt is greater than or equal to the determination value k, it is determined that the air-conditioning transition period, the process proceeds to step S80, and normal air-conditioning control is performed.

  Also in this embodiment, since the determination of the air conditioning state is based on the body surface temperature of the occupant, there is an advantage that the sense of the air conditioning state that the occupant has can be reflected in the air conditioning control.

  FIG. 22 is a schematic configuration diagram of the control system of the thirteenth embodiment, and FIG. 23 is a flowchart showing an operation procedure of the thirteenth embodiment.

  In this embodiment, the body surface temperature detection sensor 36 and the thermal sensation estimation means 37 are provided, and the thermal sensation of the occupant is estimated from the detected body surface temperature and compared with a predetermined value stored in the air conditioning control computer 21. Air conditioning control is performed.

  The thermal sensation is a human temperature sensation index: “0 = just good”, “+ 1 = warm”, “+ 2 = somewhat hot”, “+ 3 = hot”, “−1 = cool”, “−2 = somewhat cold”, “ −3 = cold ”and is estimated from the body surface temperature Tman and the like. That is, it is expressed as a function of Tman in advance, such as S = f (Tman), and is obtained by substituting an actual measurement value into this.

  As shown in FIG. 23, first, a predetermined thermal sensation value Ss stored in the air conditioning control computer 21 is read in step S35, and a body surface temperature Tman is acquired in step S40. In step S45, the thermal sensation S is calculated from the body surface temperature Tman. In step S50, the difference between the thermal sensation S and the predetermined thermal sensation Ss is calculated. If the absolute value of the difference is less than the predetermined determination value 1, the air conditioning stability period is determined and step S60 is determined. Proceed to, and air-conditioning control is performed when one person rides. On the other hand, if the absolute value of the difference between S and Ss is greater than or equal to the preset determination value l, it is determined that the air conditioning transition period, and the routine proceeds to step S80 where normal air conditioning control is performed.

  In this embodiment, the determination of the air conditioning state is based on the occupant's thermal sensation, so that the occupant feels the air conditioning state more accurately than the case where the air conditioning control is performed based on the vehicle interior temperature. There is an advantage that can be reflected in.

  FIG. 24 is a flowchart showing the operation procedure of the 14th embodiment.

  In this embodiment, when the rate of change of thermal sensation ΔS / Δt per unit time Δt is greater than or equal to the determination value m, it is determined that the air conditioning transition period and normal air conditioning control is performed. Judgment is made and air-conditioning control is performed when one person rides.

  ΔS is obtained as follows. That is, assuming that the passenger's thermal sensation before the unit time Δt is S ′ and the current occupant thermal sensation is S, the absolute value of the difference between S ′ and S is ΔS.

  In step S40, the body surface temperature Tman is acquired, and in step S45, the thermal sensation S is calculated. If ΔS / Δt is less than the determination value m in step S50, it is determined that the air conditioning is stable, and the process proceeds to step S60 to perform air conditioning control when one person is on board. On the other hand, if ΔS / Δt is greater than or equal to the determination value m, it is determined that the air conditioning transition period, and the process proceeds to step S80 to perform normal air conditioning control.

  Also in the present embodiment, since the determination of the air conditioning state is based on the occupant's thermal sensation, there is an advantage that the feeling of the air conditioning state held by the occupant can be reflected in the air conditioning control.

  In the above embodiment, an example is described in which the present invention is applied to an air conditioner that reduces the work volume of the compressor and blower by reducing the amount of blown air when taking one person, or obtaining an energy saving effect. However, the present invention is also effective in the heat pump type air conditioner for the following reason.

  That is, in a general air conditioner that employs a heat exchanger (hot water heater) that uses cooling water of a vehicle drive system such as an engine as a heat source for heating, air conditioning control for single passengers and mainly reduction of blower power only during heating (The compressor is not in operation when heating). On the other hand, since the heat pump type air conditioner operates the compressor during heating, both the blower power and the compressor power are saved, which is effective for the energy saving effect.

  In this embodiment, the air-conditioning wind blowing control selection means selects a control method corresponding to the case where a single passenger is on board, i.e., when the occupant is seated only in the driver's seat. In addition to such a case, the control system corresponding to the case where an occupant is seated in at least a part of the rear seat and the driver's seat (the occupant is not seated in the passenger seat) is included. In this case, it is preferable to limit the amount of air blown from the face outlet of the rear seat where no occupant is seated.

  In each of the above embodiments, the interlocking means is a single shaft and the dampers are rotated in the same direction. However, the interlocking means is such that some of the dampers rotate in the direction of other dampers. What is different from the rotation direction, for example, a plurality of shafts may be connected via a transmission mechanism such as a gear.

  In addition to the air-conditioning state discriminating means 34 for discriminating whether the current air-conditioning state is a plurality of previously divided patterns, various modifications can be made to the above-described embodiment without departing from the gist of the present invention. . Moreover, the air-conditioning state determination means 34 is comprised by the program stored, for example in ROM of the microcomputer.

  In addition, various modifications can be made to the above embodiment without departing from the gist of the present invention.

It is a schematic block diagram of the principal part of one Embodiment of this invention. It is a schematic block diagram of the control system of 1st Embodiment. It is a flowchart which shows the operation | movement procedure of 1st Embodiment. It is a schematic block diagram of the control system of 2nd Embodiment. It is a flowchart which shows the operation | movement procedure of 2nd Embodiment. It is a flowchart which shows the operation | movement procedure of 1st Example. It is a flowchart which shows the operation | movement procedure of 2nd Example. It is a schematic block diagram of the control system of 3rd Example. It is a flowchart which shows the operation | movement procedure of 3rd Example. It is a schematic block diagram of the control system of 4th Example. It is a flowchart which shows the operation | movement procedure of 4th Example. It is a flowchart which shows the operation | movement procedure of 5th Example. It is a schematic block diagram of the control system of 6th Example. It is a flowchart which shows the operation | movement procedure of 6th Example. It is a flowchart which shows the operation | movement procedure of 7th Example. It is a flowchart which shows the operation | movement procedure of 8th Example. It is a flowchart which shows the operation | movement procedure of 9th Example. It is a flowchart which shows the operation | movement procedure of 10th Example. It is a schematic block diagram of the control system of 11th Example. It is a flowchart which shows the operation | movement procedure of 11th Example. It is a flowchart which shows the operation | movement procedure of 12th Example. It is a schematic block diagram of the control system of 13th Example. It is a flowchart which shows the operation | movement procedure of 13th Example. It is a flowchart which shows the operation | movement procedure of 14th Example.

Explanation of symbols

3 Face duct 3a Air passage of driver's seat side central face outlet 3b Air passage of passenger seat side central face outlet 3c Air passage of driver's seat side face outlet 3b Air passage of passenger seat side face outlet 4 Driver's side central face outlet 5 Passenger's side central face outlet 6 Driver's side side face outlet 7 Passenger side side face outlet 8 Damper (passage opening / closing means of air passage 3b)
9 Damper (passage opening / closing means of air passage 3a)
10 Shaft (interlocking means)
DESCRIPTION OF SYMBOLS 11 Drive means 13 Passenger side face blower opening opening-closing means 23 Car interior temperature sensor (vehicle interior temperature detection means)
27 occupant detection means 33 air-conditioning air blowing control selection means 34 air-conditioning state determination means 35 vehicle interior content temperature detection means (vehicle interior content temperature detection sensor)
36 Body surface temperature detection sensor (body surface temperature detection means)
37 Thermal sensation estimation means

Claims (17)

It has an occupant detection means (27) for detecting whether or not an occupant is seated in each seat, and this occupant detection means (27) detects that no occupant is seated in at least one seat other than the driver's seat. In this case, the vehicle air conditioner is configured to control the air blowing state from the air conditioning air outlet facing the absent seat,
Air conditioning state determination means (34) for determining whether the current air conditioning state is one of a plurality of previously classified patterns is provided, and an occupant is detected in at least one seat excluding the driver's seat by the occupant detection means (27). When it is detected that the person is not seated, the control method of the air blowing state from the air conditioning air outlet facing the seat where the occupant is absent is switched according to the determination result of the air conditioning state determination means (34). Vehicle air conditioner. Air-conditioning air blowing control selection means (33) for selecting and inputting a control method of the air blowing state from the air-conditioning air blowing outlet facing at least one seat excluding the driver's seat, and this air-conditioning air blowing control selection means (33) The vehicle air conditioner is configured to control the air blowing state from the air conditioning air outlet facing at least one seat excluding the driver's seat by the control method selected and input when the selection input is performed by
When the air conditioning state determination means (34) for determining whether the current air conditioning state is one of a plurality of previously classified patterns, when the selection input is made by the air conditioning wind blowing control selection means (33), A vehicle air conditioner that switches a control method of an air blowing state from an air conditioning air outlet facing at least one seat excluding the driver's seat according to a determination result of the air conditioning state determination means (34).   The plurality of patterns may be an air conditioning stable period in which the thermal environment in the vehicle interior is substantially constant over time and an air conditioning transition period in which the thermal environment in the vehicle interior changes over time. The vehicle air conditioner according to claim 1 or 2.   The control method to be switched according to the determination result of the air-conditioning state determination means (34) reduces or reduces the air flow rate from the air-conditioning air outlet to any one of claims 1 to 3. The vehicle air conditioner according to claim 1.   The air conditioning state determination means (34) performs determination based on a difference between a heat load state value of the vehicle interior environment and a predetermined heat load value of the vehicle interior environment. Item 5. The vehicle air conditioner according to any one of Items 4 to 6.   6. The vehicle according to claim 5, wherein the thermal load state value is a detected value of the vehicle interior temperature detecting means (23), and the predetermined value of the thermal load is a value set in relation to the temperature in the vehicle interior. Air conditioner.   A vehicle interior content temperature detecting means (35) for detecting the temperature of the vehicle interior content is provided, the thermal load state value is set as a detected value of the vehicle interior content temperature detecting means (35), and the predetermined heat load value is set in the vehicle. 6. The vehicle air conditioner according to claim 5, wherein the value is set in relation to the room contents.   The air conditioning state determination means (34) performs determination based on a difference between a thermal load state value of the passenger compartment environment and a target thermal environment state value set by an occupant. The vehicle air conditioner as described in any one of Claims.   9. The thermal load state value as a detected value of a passenger compartment temperature detection means (23), and the target environmental state value as a set temperature set by a passenger using a temperature setter (22). Vehicle air conditioner.   The vehicle air conditioner according to any one of claims 1 to 4, wherein the air conditioning state determination means (34) performs determination based on a temporal change rate of a thermal load state value of a vehicle interior environment.   The vehicle air conditioner according to claim 10, wherein the thermal load state value is a detected value of the vehicle interior temperature detecting means (23).   The vehicle interior content temperature detecting means (35) for detecting the temperature of the vehicle interior content is provided, and the thermal load state value is set as a detection value of the vehicle interior content temperature detecting means (35). The vehicle air conditioner according to 10.   The vehicle air conditioner according to any one of claims 1 to 4, wherein the air conditioning state determination means (34) performs determination based on a temporal change rate of a control amount calculation value of the air conditioning control computer (21).   Body surface temperature detecting means (36) for detecting the body surface temperature of the occupant is provided, and the air conditioning state determining means (34) is configured to detect a detected value of the body surface temperature detecting means (36) and a preset body surface temperature of the occupant. The vehicle air conditioner according to any one of claims 1 to 4, wherein the determination is made based on a difference from a predetermined value related to the vehicle.   Body surface temperature detecting means (36) for detecting the body surface temperature of the occupant is provided, and the air conditioning state determining means (34) performs determination based on the temporal change rate of the detected value of the body surface temperature detecting means (36). The vehicle air conditioner according to any one of claims 1 to 4.   A body surface temperature detecting means (36) for detecting the body surface temperature of the occupant, and a thermal sensation estimating means (37) for estimating the thermal sensation for estimating the thermal sensation of the occupant from the detected value, the air conditioning state The determination means (34) makes a determination based on a difference between the thermal sensation calculated by the thermal sensation estimation means (37) and a predetermined value related to the thermal sensation of the passenger set in advance. The vehicle air conditioner according to any one of claims 1 to 4.   A body surface temperature detecting means (36) for detecting the body surface temperature of the occupant, and a thermal sensation estimating means (37) for estimating the thermal sensation for estimating the thermal sensation of the occupant from the detected value, the air conditioning state The vehicle air conditioner according to any one of claims 1 to 4, wherein the determination means (34) makes a determination based on a temporal change rate of the thermal sensation calculated by the thermal sensation estimation means (37).

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